 But it's not. They don't force you to use it. They should. And a lot of roofers don't use it, but there are some out there that do. So if you're planning on getting a new roof, even if you don't have it now, you should ask them for it. It's not very expensive. It's going to add maybe $200 or $300, depending on the size of your roof, to the job, but it shouldn't be much more than that.